Improvement in thrashing-machines



UNITED STATns LEWIS C. BIGKINGS, OF NORRISTOWN, llfllhllTSYIlVANIA.`

IMPROVEMENT IN THFiASHlNGfMAC-HINES.l

Specification forming part of Letters Patent No. l39,857,dated June 17, 1873; application filled May 3, 1873.

To all whom 'it may concern:

Be it known that I, Lewis C. BICKINGs, of Norristown, county ot' Montgomery, State ot' Pennsylvania, have invented a certain Improvement in Thrashing-Machines, of which the following is a specification:

The object of my invention is to construct the concave and the thrashing-cylinder in such a manner as to thrash out the grain without tan gling or injuring the straw. Itis more particularly adapted for use in thrashing out rye, in which it is desired to preserve the straw straight and even.

Figure lis a side elevation ot' a thrashingtahle and cylinder, showing my invention applied. Fig Zisa perspectiveview (enlarged) of my invention detached from the table.

rlhe concave A is inadc with a smooth surface of sheet iron, or any other exible metal or material, and is secured to the under side 0f a cross-beam, B, which is hinged to the box or `casing O directly over the thrashingcylinder, as shown in Fig. l. The thrashingcylinder D, which is otherwise of the ordinary construction, is furnished with seventy-two teeth, arranged in parallel rows lengthwise with the cylinder, and in an oblique position around the periphery, as shown in Fig. 2, so that the entire surface of the concave is swept at one revolution of the cylinder.

A portion of the concave A is extended over so as to retain the grain down on the cylinder and prevent `thecereal passing.,M through too rapidly, thereby more eiectually:

thrashing the grain1 from the stalks.l The tlexibility of the concavepermits the project-Il i ing portion to he turned or bent downward to retain the grain in `closer contact with `the cylinder in case it is not thoroughly ihrashed .A

from the straw.`

even into the cylinder with the grain foremost, and held until the straw has `passed about one hull' way through, or until a suiiicient gripe ,1

has been obtained to draw it through, and as the cylinder revolves the teeth strike the heads containing the grain. While the teeth,

owing to their being secured in straight lines 1 around the periphery, pass between the stalks without breaking or tangling them.

`The straw passes from the cylinder to the even, from shaker perfectly straight and whence it is removed and bundled.,`

What I claim as myinvention is- Ihe flexible concave A in combination with the thrashing-cylinder D, arran ged and operating substantially in the manner and for the purpose herein shown and described.`

` LEWIS C. BICKINGS. Witnesses IsAAe `R.` OAKFORD, Trios. J. Ronnie.

ATF-.NT QFFIGE,o 

